1 Answer
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NetRouteView is a GUI alternative to the standard route utility
(Route.exe) of Windows operating system. It displays the list of all
routes on your current network, including the destination, mask,
gateway, interface IP address, metric value, type, protocol, age (in
seconds), interface name, and the MAC address. NetRouteView also
allows you to easily add new routes, as well as to remove or modify
existing static routes.

Win IP Configuration Manager is a replacement for the annoying command
line tools "ipconfig.exe" and "route.exe". This version also includes
the "netstat.exe" tool. Win IP Configuration Manager shows you the IP
settings of the installed network interfaces. IP addresses obtained by
DHCP can be renewed by Win IP Config. Routes can easily be added,
removed, changed or made persistent by this tool. Network interfaces
can administratively be enabled or disabled, repectively. Throughput
statistics can be watched for each of the network interfaces in a
separate window. The program has full capabilities with Windows 2000,
Windows XP and Windows Vista. Some functions are not supported under
Windows 98. Windows ME should behave like Windows 98, but this has not
been tested.

Moreover, I still think the best way is following a good guide to do it(even using a GUI tool) because there are a lot of details to pay attention on changing routes.